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From: Vincenzo Frascino <vincenzo.frascino@arm.com>
To: John Stultz <john.stultz@linaro.org>
Cc: linux-arch@vger.kernel.org,
	Shijith Thotton <sthotton@marvell.com>,
	Peter Collingbourne <pcc@google.com>,
	Arnd Bergmann <arnd@arndb.de>, Huw Davies <huw@codeweavers.com>,
	Andre Przywara <andre.przywara@arm.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Will Deacon <will.deacon@arm.com>,
	lkml <linux-kernel@vger.kernel.org>,
	Ralf Baechle <ralf@linux-mips.org>,
	linux-mips@vger.kernel.org, Paul Burton <paul.burton@mips.com>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	linux-kselftest@vger.kernel.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	Russell King <linux@armlinux.org.uk>,
	Dmitry Safonov <0x7f454c46@gmail.com>,
	Mark Salyzyn <salyzyn@android.com>, Shuah Khan <shuah@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v7 10/25] arm64: compat: Add vDSO
Date: Wed, 10 Jul 2019 14:41:10 +0100
Message-ID: <6792a9f4-d8ed-b71d-b07c-e774da703dfa@arm.com> (raw)
In-Reply-To: <d9b171d5-896c-c4f7-eb2d-182ce2ce2d30@arm.com>

Hi John,

On 10/07/2019 10:47, Vincenzo Frascino wrote:
> Hi John,
> 
> On 10/07/2019 05:02, John Stultz wrote:
>> On Fri, Jun 21, 2019 at 3:18 AM Vincenzo Frascino
>> <vincenzo.frascino@arm.com> wrote:
>>>
>>> Provide the arm64 compat (AArch32) vDSO in kernel/vdso32 in a similar
>>> way to what happens in kernel/vdso.
>>>
>>> The compat vDSO leverages on an adaptation of the arm architecture code
>>> with few changes:
>>>  - Use of lib/vdso for gettimeofday
>>>  - Implementation of syscall based fallback
>>>  - Introduction of clock_getres for the compat library
>>>  - Implementation of trampolines
>>>  - Implementation of elf note
>>>
>>> To build the compat vDSO a 32 bit compiler is required and needs to be
>>> specified via CONFIG_CROSS_COMPILE_COMPAT_VDSO.
>>>
>>
>> Hey Vincenzo!
>>   Congrats on getting this work merged, I know its been a long effort
>> over a number of years!
>>
>> Though unfortunately, it seems the arm64 vdso code that just landed is
>> breaking AOSP for me.
>>
>> I see a lot of the following errors:
>> 01-01 01:22:14.097   755   755 F libc    : Fatal signal 11 (SIGSEGV),
>> code 1 (SEGV_MAPERR), fault addr 0x3cf2c96c in tid 755 (cameraserver),
>> pid 755 (cameraserver)
>> 01-01 01:22:14.112   759   759 F libc    : Fatal signal 11 (SIGSEGV),
>> code 1 (SEGV_MAPERR), fault addr 0x3cf2c96c in tid 759
>> (android.hardwar), pid 759 (android.hardwar)
>> 01-01 01:22:14.120   756   756 F libc    : Fatal signal 11 (SIGSEGV),
>> code 1 (SEGV_MAPERR), fault addr 0x3cf2c96c in tid 756 (drmserver),
>> pid 756 (drmserver)
>>
>> Which go away if I revert the vdso merge that went in via tip/timers.
>>
>> I tried to bisect things down a bit, but as some later fixes are
>> required (at one point, date was returning the start epoch and never
>> increasing), this hasn't worked too well. But I'm guessing since I
>> see: "CROSS_COMPILE_COMPAT not defined or empty, the compat vDSO will
>> not be built", and the system is half working, I'm guessing this is an
>> issue with just the 32bit code failing.  While I can try to sort out
>> the proper CROSS_COMPILE_COMPAT in my build environment, I assume
>> userland shouldn't be crashing if that value isn't set.
>>
>> Any chance this issue has already been raised?
>>
> 
> I do not have Android (bionic/libc) as part of my testing environment hence I
> never saw this issue. Thanks for reporting it.
> 
> I am investigating the problem and will post a fix as soon as it is ready.
> 
> As Will suggested, .config would help the debugging and I would like to ask to
> you to test my fix once it is ready. Is that OK for you?
> 
>> thanks
>> -john
>>
> 

Seems that the problem you are experiencing is caused by an ABI regression for
which I provided a fix in [1]. Could you please verify that works for you as well?

[1] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2046889.html

Please find below the tests that I conducted to verify that when
CROSS_COMPILE_COMPAT is not defined or empty the compat vdso library is not exposed.

# cat main-arm32.c

#include <stdio.h>
#include <sys/auxv.h>

int main()
{
	uintptr_t vdso = (uintptr_t) getauxval(AT_SYSINFO_EHDR);

	printf("AT_SYSINFO_EHDR: %p\n", vdso);

[...]

	return 0;
}

# file main-arm32
main-arm32: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically
linked, interpreter /lib/ld-, for GNU/Linux 3.2.0, with d

When CROSS_COMPILE_COMPAT is _not_ defined:
===========================================

# ./main-arm32
AT_SYSINFO_EHDR: (nil)

Memory Map:
-----------

00008000-00010000 rw-p 00000000 00:00 0
00010000-00011000 r-xp 00000000 00:13 24905929 /home/vinfra01/bin/main-arm32
00011000-00020000 rw-p 00000000 00:00 0
00020000-00021000 r--p 00000000 00:13 24905929 /home/vinfra01/bin/main-arm32
00021000-00022000 rw-p 00001000 00:13 24905929 /home/vinfra01/bin/main-arm32
00022000-f773d000 rw-p 00000000 00:00 0        [heap]
f773d000-f781f000 r-xp 00000000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f781f000-f782f000 ---p 000e2000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f782f000-f7831000 r--p 000e2000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f7831000-f7832000 rw-p 000e4000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f7832000-f7835000 rw-p 00000000 00:00 0
f7835000-f784b000 rw-p 00000000 00:00 0
f784b000-f7863000 r-xp 00000000 00:13 24906908 /lib/arm-linux-gnueabihf/ld-2.27.so
f7863000-f7870000 rw-p 00000000 00:00 0
f7870000-f7872000 rw-p 00000000 00:00 0
f7872000-f7873000 r-xp 00000000 00:00 0        [sigpage]
f7873000-f7874000 r--p 00018000 00:13 24906908 /lib/arm-linux-gnueabihf/ld-2.27.so
f7874000-f7875000 rw-p 00019000 00:13 24906908 /lib/arm-linux-gnueabihf/ld-2.27.so
f7875000-ff77a000 rw-p 00000000 00:00 0
ff87a000-ff89b000 rw-p 00000000 00:00 0        [stack]
ff89b000-ffff0000 rw-p 00000000 00:00 0
ffff0000-ffff1000 r-xp 00000000 00:00 0        [vectors]
ffff1000-fffff000 rw-p 00000000 00:00 0


vdsotest for compat [2]:
------------------------

Note: vDSO version of clock_gettime not found
clock-gettime-monotonic: syscall: 796 nsec/call
clock-gettime-monotonic:    libc: 816 nsec/call
clock-gettime-monotonic:    vdso: not tested
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_getres not found
clock-getres-monotonic: syscall: 567 nsec/call
clock-getres-monotonic:    libc: 581 nsec/call
clock-getres-monotonic:    vdso: not tested
Note: vDSO version of clock_getres not found
Note: vDSO version of clock_getres not found
Note: vDSO version of clock_gettime not found
clock-gettime-monotonic-coarse: syscall: 617 nsec/call
clock-gettime-monotonic-coarse:    libc: 656 nsec/call
clock-gettime-monotonic-coarse:    vdso: not tested
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_getres not found
clock-getres-monotonic-coarse: syscall: 591 nsec/call
clock-getres-monotonic-coarse:    libc: 614 nsec/call
clock-getres-monotonic-coarse:    vdso: not tested
Note: vDSO version of clock_getres not found
Note: vDSO version of clock_getres not found
Note: vDSO version of clock_gettime not found
clock-gettime-realtime: syscall: 819 nsec/call
clock-gettime-realtime:    libc: 858 nsec/call
clock-gettime-realtime:    vdso: not tested
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_getres not found
clock-getres-realtime: syscall: 567 nsec/call
clock-getres-realtime:    libc: 583 nsec/call
clock-getres-realtime:    vdso: not tested
Note: vDSO version of clock_getres not found
Note: vDSO version of clock_getres not found
Note: vDSO version of clock_gettime not found
clock-gettime-realtime-coarse: syscall: 599 nsec/call
clock-gettime-realtime-coarse:    libc: 638 nsec/call
clock-gettime-realtime-coarse:    vdso: not tested
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_gettime not found
Note: vDSO version of clock_getres not found
clock-getres-realtime-coarse: syscall: 591 nsec/call
clock-getres-realtime-coarse:    libc: 610 nsec/call
clock-getres-realtime-coarse:    vdso: not tested
Note: vDSO version of clock_getres not found
Note: vDSO version of clock_getres not found
Note: vDSO version of getcpu not found
getcpu: syscall: 431 nsec/call
getcpu:    libc: 451 nsec/call
getcpu:    vdso: not tested
Note: vDSO version of getcpu not found
Note: vDSO version of getcpu not found
Note: vDSO version of gettimeofday not found
gettimeofday: syscall: 765 nsec/call
gettimeofday:    libc: 808 nsec/call
gettimeofday:    vdso: not tested
Note: vDSO version of gettimeofday not found
Note: vDSO version of gettimeofday not found

When CROSS_COMPILE_COMPAT is defined:
=====================================

# ./main-arm32
AT_SYSINFO_EHDR: 0xf7a67000

Memory map:
-----------

00008000-00010000 rw-p 00000000 00:00 0
00010000-00011000 r-xp 00000000 00:13 24905929 /home/vinfra01/bin/main-arm32
00011000-00020000 rw-p 00000000 00:00 0
00020000-00021000 r--p 00000000 00:13 24905929 /home/vinfra01/bin/main-arm32
00021000-00022000 rw-p 00001000 00:13 24905929 /home/vinfra01/bin/main-arm32
00022000-f7932000 rw-p 00000000 00:00 0        [heap]
f7932000-f7a14000 r-xp 00000000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f7a14000-f7a24000 ---p 000e2000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f7a24000-f7a26000 r--p 000e2000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f7a26000-f7a27000 rw-p 000e4000 00:13 24906912 /lib/arm-linux-gnueabihf/libc-2.27.so
f7a27000-f7a2a000 rw-p 00000000 00:00 0
f7a2a000-f7a40000 rw-p 00000000 00:00 0
f7a40000-f7a58000 r-xp 00000000 00:13 24906908 /lib/arm-linux-gnueabihf/ld-2.27.so
f7a58000-f7a64000 rw-p 00000000 00:00 0
f7a64000-f7a66000 rw-p 00000000 00:00 0
f7a66000-f7a67000 r--p 00000000 00:00 0        [vvar]
f7a67000-f7a68000 r-xp 00000000 00:00 0        [vdso]
f7a68000-f7a69000 r--p 00018000 00:13 24906908 /lib/arm-linux-gnueabihf/ld-2.27.so
f7a69000-f7a6a000 rw-p 00019000 00:13 24906908 /lib/arm-linux-gnueabihf/ld-2.27.so
f7a6a000-ff6d8000 rw-p 00000000 00:00 0
ff7d8000-ff7f9000 rw-p 00000000 00:00 0        [stack]
ff7f9000-ffff0000 rw-p 00000000 00:00 0
ffff0000-ffff1000 r-xp 00000000 00:00 0        [vectors]
ffff1000-fffff000 rw-p 00000000 00:00 0

vdsotest for compat [2]:
------------------------

clock-gettime-monotonic: syscall: 700 nsec/call
clock-gettime-monotonic:    libc: 226 nsec/call
clock-gettime-monotonic:    vdso: 189 nsec/call
clock-getres-monotonic: syscall: 582 nsec/call
clock-getres-monotonic:    libc: 581 nsec/call
clock-getres-monotonic:    vdso: 40 nsec/call
clock-gettime-monotonic-coarse: syscall: 618 nsec/call
clock-gettime-monotonic-coarse:    libc: 103 nsec/call
clock-gettime-monotonic-coarse:    vdso: 85 nsec/call
clock-getres-monotonic-coarse: syscall: 602 nsec/call
clock-getres-monotonic-coarse:    libc: 610 nsec/call
clock-getres-monotonic-coarse:    vdso: 64 nsec/call
clock-gettime-realtime: syscall: 741 nsec/call
clock-gettime-realtime:    libc: 209 nsec/call
clock-gettime-realtime:    vdso: 189 nsec/call
clock-getres-realtime: syscall: 627 nsec/call
clock-getres-realtime:    libc: 604 nsec/call
clock-getres-realtime:    vdso: 41 nsec/call
clock-gettime-realtime-coarse: syscall: 640 nsec/call
clock-gettime-realtime-coarse:    libc: 105 nsec/call
clock-gettime-realtime-coarse:    vdso: 84 nsec/call
clock-getres-realtime-coarse: syscall: 597 nsec/call
clock-getres-realtime-coarse:    libc: 608 nsec/call
clock-getres-realtime-coarse:    vdso: 46 nsec/call
Note: vDSO version of getcpu not found
getcpu: syscall: 492 nsec/call
getcpu:    libc: 492 nsec/call
getcpu:    vdso: not tested
Note: vDSO version of getcpu not found
Note: vDSO version of getcpu not found
gettimeofday: syscall: 664 nsec/call
gettimeofday:    libc: 224 nsec/call
gettimeofday:    vdso: 185 nsec/call

[2] https://github.com/nathanlynch/vdsotest

-- 
Regards,
Vincenzo

  reply index

Thread overview: 108+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-21  9:52 [PATCH v7 00/25] Unify vDSOs across more architectures Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 01/25] kernel: Standardize vdso_datapage Vincenzo Frascino
2019-06-24 13:56   ` Catalin Marinas
2019-06-21  9:52 ` [PATCH v7 02/25] kernel: Define gettimeofday vdso common code Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 03/25] kernel: Unify update_vsyscall implementation Vincenzo Frascino
2019-06-21 10:49   ` Huw Davies
2019-06-21  9:52 ` [PATCH v7 04/25] arm64: Substitute gettimeofday with C implementation Vincenzo Frascino
2019-06-24 13:36   ` Will Deacon
2019-06-24 13:59     ` Vincenzo Frascino
2019-06-25 16:18     ` [PATCH 1/3] lib/vdso: Delay mask application in do_hres() Vincenzo Frascino
2019-06-25 16:18       ` [PATCH 2/3] arm64: Fix __arch_get_hw_counter() implementation Vincenzo Frascino
2019-06-25 16:18       ` [PATCH 3/3] arm64: compat: " Vincenzo Frascino
2019-06-25 17:02       ` [PATCH 1/3] lib/vdso: Delay mask application in do_hres() Thomas Gleixner
2019-06-25 18:27         ` Thomas Gleixner
2019-06-25 20:15           ` Andy Lutomirski
2019-06-25 22:24             ` Thomas Gleixner
2019-06-26  6:38         ` Thomas Gleixner
2019-06-26  9:25           ` Vincenzo Frascino
2019-06-26 10:02             ` lib/vdso: Make delta calculation work correctly Thomas Gleixner
2019-06-26 11:08               ` Vincenzo Frascino
2019-06-24 13:58   ` [PATCH v7 04/25] arm64: Substitute gettimeofday with C implementation Catalin Marinas
2019-06-25 15:33   ` Dave Martin
2019-06-26 13:27     ` Vincenzo Frascino
2019-06-26 16:14       ` Dave Martin
2019-06-26 19:01         ` Vincenzo Frascino
2019-06-27 10:01           ` Dave Martin
2019-06-27 10:57             ` Vincenzo Frascino
2019-06-27 11:27               ` Dave Martin
2019-06-27 11:59                 ` Vincenzo Frascino
2019-06-27 14:38                   ` Dave Martin
2019-06-27 15:34                     ` Vincenzo Frascino
2019-06-25 17:43   ` [PATCH] arm64: vdso: Fix compilation with clang < 8 Vincenzo Frascino
2019-06-26 11:36   ` [PATCH v2] arm64: vdso: Fix compilation with clang older then 8 Vincenzo Frascino
     [not found]   ` <CGME20190628130921eucas1p239935b0771032c331911eacc1a69dd2e@eucas1p2.samsung.com>
2019-06-28 13:09     ` [PATCH v7 04/25] arm64: Substitute gettimeofday with C implementation Marek Szyprowski
2019-06-28 14:32       ` Vincenzo Frascino
2019-06-28 16:50         ` Sylwester Nawrocki
2019-06-29  6:58           ` Vincenzo Frascino
2019-07-08 12:57             ` Sylwester Nawrocki
2019-07-08 13:09               ` Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 05/25] arm64: Build vDSO with -ffixed-x18 Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 06/25] arm64: compat: Add missing syscall numbers Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 07/25] arm64: compat: Expose signal related structures Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 08/25] arm64: compat: Generate asm offsets for signals Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 09/25] lib: vdso: Add compat support Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 10/25] arm64: compat: Add vDSO Vincenzo Frascino
2019-06-24 14:00   ` Catalin Marinas
2019-07-10  4:02   ` John Stultz
2019-07-10  6:12     ` Thomas Gleixner
2019-07-10  9:48       ` Vincenzo Frascino
2019-07-10  8:27     ` Will Deacon
2019-07-10  8:58       ` Thomas Gleixner
2019-07-10  9:12         ` Will Deacon
2019-07-10  9:47     ` Vincenzo Frascino
2019-07-10 13:41       ` Vincenzo Frascino [this message]
2019-07-10 13:04   ` [PATCH] arm64: vdso: Fix ABI regression in compat vdso Vincenzo Frascino
2019-07-10 13:25     ` Will Deacon
2019-07-10 13:42       ` Vincenzo Frascino
2019-07-10 14:01   ` [PATCH v2] " Vincenzo Frascino
2019-07-10 15:44     ` John Stultz
2019-07-10 15:53       ` Vincenzo Frascino
2019-07-11  9:45     ` Will Deacon
2019-07-11 10:34       ` Thomas Gleixner
2019-07-11 11:32         ` Will Deacon
2019-06-21  9:52 ` [PATCH v7 11/25] arm64: Refactor vDSO code Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 12/25] arm64: compat: vDSO setup for compat layer Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 13/25] arm64: elf: vDSO code page discovery Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 14/25] arm64: compat: Get sigreturn trampolines from vDSO Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 15/25] arm64: Add vDSO compat support Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 16/25] arm: Add support for generic vDSO Vincenzo Frascino
2019-12-04 13:51   ` [PATCH v7 16/25] arm: Add support for generic vDSO (causing crash) Guenter Roeck
2019-12-04 13:58     ` Vincenzo Frascino
2019-12-04 16:16       ` Guenter Roeck
2019-12-04 17:15         ` Vincenzo Frascino
2019-12-04 19:39           ` Guenter Roeck
2019-12-05  9:42           ` Philippe Mathieu-Daudé
2019-12-05 10:00             ` Vincenzo Frascino
2019-12-05 11:02               ` Arnd Bergmann
2019-12-05 14:56                 ` Philippe Mathieu-Daudé
2019-06-21  9:52 ` [PATCH v7 17/25] arm: Add clock_getres entry point Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 18/25] arm: Add clock_gettime64 " Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 19/25] mips: Add support for generic vDSO Vincenzo Frascino
2019-07-26  5:15   ` Paul Burton
2019-07-26 16:29     ` [PATCH 0/2] mips: vdso: Fix Makefile Vincenzo Frascino
2019-07-26 16:29       ` [PATCH 1/2] mips: vdso: Fix source path Vincenzo Frascino
2019-07-26 16:29       ` [PATCH 2/2] mips: vdso: Fix flip/flop vdso building bug Vincenzo Frascino
2019-07-28 22:20       ` [PATCH 0/2] mips: vdso: Fix Makefile Paul Burton
2019-06-21  9:52 ` [PATCH v7 20/25] mips: Add clock_getres entry point Vincenzo Frascino
2019-07-26  5:15   ` Paul Burton
2019-06-21  9:52 ` [PATCH v7 21/25] mips: Add clock_gettime64 " Vincenzo Frascino
2019-07-26  5:15   ` Paul Burton
2019-06-21  9:52 ` [PATCH v7 22/25] x86: Add support for generic vDSO Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 23/25] x86: Add clock_getres entry point Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 24/25] x86: Add clock_gettime64 " Vincenzo Frascino
2019-06-21  9:52 ` [PATCH v7 25/25] kselftest: Extend vDSO selftest Vincenzo Frascino
2019-06-24  0:34 ` [PATCH v7 00/25] Unify vDSOs across more architectures Thomas Gleixner
2019-06-24  1:15   ` Andy Lutomirski
2019-06-24  7:42     ` Thomas Gleixner
2019-06-24 13:21   ` Vincenzo Frascino
2019-06-24 14:18   ` Thomas Gleixner
2019-06-24 14:23     ` Russell King - ARM Linux admin
2019-06-24 14:49       ` Catalin Marinas
2019-06-24 16:20         ` Vincenzo Frascino
2019-10-25 11:42         ` Geert Uytterhoeven
2019-06-24 18:41   ` Paul Burton
2019-06-24 23:16     ` Vincenzo Frascino
2019-06-25 17:11       ` Paul Burton
2019-06-25 17:17         ` Vincenzo Frascino
2019-06-24 12:50 ` Andre Przywara

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    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-MIPS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-mips/0 linux-mips/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-mips linux-mips/ https://lore.kernel.org/linux-mips \
		linux-mips@vger.kernel.org
	public-inbox-index linux-mips

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-mips


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git